The Energy Levels of a Quantum Harmonic Oscillator

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SUMMARY

The discussion centers on the energy levels of a quantum harmonic oscillator, specifically addressing the derivation of energy from the equation a + b x² = c. Participants clarify that for the equation to hold true for all x, constants a and c must be equal, and b must be zero. The ground state energy is confirmed to align with the lowest value derived from the uncertainty principle, prompting questions about energy levels in other potential functions. The complexity of the general solution is acknowledged, indicating a significant mathematical challenge.

PREREQUISITES
  • Understanding of quantum mechanics principles, particularly the quantum harmonic oscillator.
  • Familiarity with the uncertainty principle in quantum physics.
  • Basic algebraic manipulation of equations involving constants and variables.
  • Knowledge of differential equations as they relate to quantum systems.
NEXT STEPS
  • Study the derivation of energy levels in the quantum harmonic oscillator using the Schrödinger equation.
  • Explore the implications of the uncertainty principle on ground state energy in various potential functions.
  • Investigate the mathematical techniques used in solving differential equations in quantum mechanics.
  • Learn about the comparison of energy levels in different quantum systems beyond the harmonic oscillator.
USEFUL FOR

Students of quantum mechanics, physicists exploring quantum systems, and anyone interested in the mathematical foundations of quantum energy levels.

mrausum
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I've followed this:

http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/hosc3.html#c1,

up to the part where it gets to here:

hosc12.gif
.

The guide says: "Then setting the constant terms equal gives the energy"? Am I being stupid? I really can't see where that equations come from.
 

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They have an equation of the form
a + b x^2 = c
which is true for all values of x. The only way for that to be true for all values of x is for a = c and b = 0. a and c are the constant terms they talk about, they do not depend on x. It gives the energy because the RHS of the equation only has the energy in it.
 
kanato said:
They have an equation of the form
a + b x^2 = c
which is true for all values of x. The only way for that to be true for all values of x is for a = c and b = 0. a and c are the constant terms they talk about, they do not depend on x. It gives the energy because the RHS of the equation only has the energy in it.

Ah, of course. Thanks. Is it just by chance that the ground state energy is equal to the lowest possible value calculated from the uncertainty principle? I'm guessing the ground state energy for other potential functions is greater than that from the UP?

Also, is this:

hosc3.gif


just a particular integral that happens to give the lowest energy? I'm reading on now and it looks like the general solution is a ton of maths :(
 

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